See previous parts – http://sunnyvarkeyk.com/question-tags-part-1/, http://sunnyvarkeyk.com/question-tags-part-2/

Note:- Imperative sentences ( i.e. request or command) are a class apart. If they are simple requests or commands, they usually take ‘will you?’, no matter whether it is positive or negative.

• Pass me the newspaper, will you? (P)
• Don’t be late for dinner, will you? (N)

BUT if you give more urgency or a tone of personal entreaty, “won’t you” may be used.

• Don’t be hasty when you cross the road, won’t you? (N)
• Remember to lock the door, won’t you? (P)

Note:-  To show annoyance or for a rebuke, you may use “can’t you?”

• Use your common sense, can’t you? (P)
• Never take my pen again without my permission, can’t you? (N)